Flask-SQLAlchemy not creating my tables

Question

SQLAlchemy and for some reason when i run my create_db.py only the migration table is created. I tried it from python terminal with from modules import db,models then running db.create_all() but it still gives the same result.

this is my models.py.

from __init__ import db
from datetime import datetime

class Batch(db.Model):
    __tablename__='batch'
    batch_id = db.Column(db.String, primary_key=True)
    #total = db.Column(db.Integer)
    success = db.Column(db.Integer)
    failure = db.Column(db.Integer)
    folder = db.Column(db.String(15))
    email = db.Column(db.String(20))
    detail = db.relationship('Conversion', backref='details',lazy='dynamic')
    platform = db.relationship('Platform', backref='pub_data', lazy = 'dynamic')

    def __init__(self,batch_id,success,failure,folder,email):
        self.batch_id = batch_id
        self.success = success
        self.failure = failure
        self.folder = folder
        self.email = email

class Conversion(db.Model):
    __tablename__ = 'conversion'
    id = db.Column(db.Integer, primary_key=True)
    batch_id = db.Column(db.String,db.ForeignKey('batch.batch_id'))
    file_names = db.Column(db.String)
    status = db.Column(db.String(6))
    error = db.Column(db.Text)
    res_prop = db.Column(db.Integer)        

    def __init__(self,batch_id,file_names,status,res_prop,error=None):
        self.batch_id = batch_id
        self.file_names = file_names
        self.status = status
        self.error = error
        self.res_prop = res_prop

class Platform(db.Model):
    __tablename__ = 'platform'
    id= db.Column(db.Integer,primary_key=True)
    batch_id = db.Column(db.String, db.ForeignKey('batch.batch_id'))
    title = db.Column(db.String)
    pub_date = db.Column(db.DateTime)

    def __init__(self,batch_id,title):
        self.batch_id = batch_id
        self.title = title
        self.pub_date = datetime()

And here is my create_db.py

from modules import models
from modules import db
from migrate.versioning import api
from modules.default_config import SQLALCHEMY_DATABASE_URI , SQLALCHEMY_MIGRATE_REPO
import os.path

db.create_all()
db.session.commit()
if not os.path.exists(SQLALCHEMY_MIGRATE_REPO):
    api.create(SQLALCHEMY_MIGRATE_REPO, 'database repository')
    api.version_control(SQLALCHEMY_DATABASE_URI, SQLALCHEMY_MIGRATE_REPO)
else:
    api.version_control(SQLALCHEMY_DATABASE_URI, SQLALCHEMY_MIGRATE_REPO, api.version(SQLALCHEMY_MIGRATE_REPO))

Answer 1

on changing

from __init__ import db

to

from modules import db

in models.py it worked. when running flask application from outside package one needs to import everything from the package itself and not the individual modules.